Vehicle Panoramic View System Non-Central Camera Distortion Correction
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Solution Overview
Problem
Panoramic view systems for vehicles often result in distorted representations when the camera is mounted non-centrically, affecting both the camera image and overlay projections on display units.
Innovation Solution
A panoramic view system comprising a real camera, an image processing unit, and a display unit, where the image processing unit corrects perspective distortions by projecting the camera image onto a perpendicular plane and aligns it with undistorted geometric forms using an affine transformation, considering extrinsic and intrinsic camera parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the camera is mounted non-centrically on the vehicle, then the camera can capture the region ahead of the vehicle, but the projected image or overlay appears distorted on the display unit
Solution Approach 1:
The patent applies parameter changes by transforming the image data through mathematical operations (affine transformation) to compensate for the non-central mounting position. The image processing unit modifies parameters such as perspective, scale, and orientation of the captured image to correct distortions, allowing the camera to be mounted in flexible positions while maintaining undistorted display output.
2Adaptability or versatility
If the camera is mounted non-centrically on the vehicle, then the camera can capture the region ahead of the vehicle, but the overlay or image of the camera appears distorted
Solution Approach 1:
The patent transforms geometric parameters of both the captured image and the overlay elements through affine transformation. This ensures that geometric forms in the overlay (such as trajectory lines or measurement indicators) maintain their correct shapes and proportions when displayed alongside the corrected camera image, regardless of the camera's non-central mounting position.
3Device complexity
If the image is projected directly from a non-centered camera position, then the representation is simple, but the image and overlay cannot be aligned properly on the display unit
Solution Approach 1:
The patent uses affine transformation to change the spatial parameters of the image coordinates, mapping them from the camera's non-central perspective to a corrected view that aligns with the overlay elements. This mathematical transformation adjusts position, orientation, and scale parameters to achieve precise alignment between the camera image and geometric overlays on the display unit.
Data Source
AI summary
A vehicle's panoramic view system includes a non-centered real camera that captures an image of surroundings, a virtual camera, an image processing unit, and a display unit that displays a geometric form overlaid over the captured image. The image processing unit projects the captured image onto a first plane perpendicular to the real camera to correct perspective distortions resulting from the camera's non-centered position, and projects the geometric form onto a second plane perpendicular to the virtual camera to represent the geometric form without distortion on the display unit. The image processing unit finds an affine transformation between the first and second planes by delta transformation between the real and virtual cameras, and applies the affine transformation to the first plane containing the projected distortion-corrected captured image, to align a modified representation of the image with the undistorted geometric form in the second plane.